Pets are not allowed at the casino/lodge. However, if you were to ask the lodge, they would recommend they do allow them at the Hollow Rock Resort which is only three miles away. (And a great place I might add).
They do not accept pets for sure. We have 3 dogs and I have asked the question.
I also believe it is a pet free establishment.....but the toll free number should be called.
When I was there, there were dogs on the beach property, but I never saw them in the hotel. I believe they also have cabins and an RV park. I would call the toll free number 1-800-543-1384 for options on pets. They are very helpful there!
Get an answer from Grand Portage Lodge and Casino staff and past guests.